On 18/11/2022 09:53, Neil Armstrong wrote:
> The Qualcomm SM8550 SoC Modem Processing SubSystem requires that a memory
> region named DSM should be shared with the Application Processor SubSystem.
>
> This adds bindings for this MPSS DSM memory and driver implementation to
> share this memory region with the Modem Processing SubSystem.
>
> The MPSS DSM memory must be shared between the APPS SubSystem and the MPSS
> SubSystems, for the whole lifetime of the system.
>
> To: Andy Gross <agross@kernel.org>
> To: Bjorn Andersson <andersson@kernel.org>
> To: Konrad Dybcio <konrad.dybcio@somainline.org>
> To: Rob Herring <robh+dt@kernel.org>
> To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
> To: Frank Rowand <frowand.list@gmail.com>
> Cc: linux-arm-msm@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
>
> ---
> Changes in v2:
> - Fixed the bindings
> - Added some precision on the MPSS DSM in commit messages
> - Link to v1: https://lore.kernel.org/r/20221114-narmstrong-sm8550-upstream-mpss_dsm-v1-0-158dc2bb6e96@linaro.org
>
> ---
> Neil Armstrong (2):
> dt-bindings: reserved-memory: document Qualcomm MPSS DSM memory
> soc: qcom: add MDSS DSM memory driver
>
> .../reserved-memory/qcom,mpss-dsm-mem.yaml | 37 +++++++++
> drivers/of/platform.c | 1 +
> drivers/soc/qcom/Kconfig | 10 +++
> drivers/soc/qcom/Makefile | 1 +
> drivers/soc/qcom/mpss_dsm_mem.c | 95 ++++++++++++++++++++++
> 5 files changed, 144 insertions(+)
> ---
> base-commit: 999e0145579c0e04174044a39257a4d96ee30020
> change-id: 20221114-narmstrong-sm8550-upstream-mpss_dsm-21c438c65f9b
>
> Best regards,
After discussions on https://lore.kernel.org/all/20221114-narmstrong-sm8550-upstream-mpss_dsm-v1-0-158dc2bb6e96@linaro.org/,
handling of this memory zone will be integrated into the remoteproc PAS changes.
Neil